Selector



SELECTOR. Y APPLICATION FILI ED JULY 16,19l7. 1,413,329. e ted Apr. 18, 192-2.

2 SHEETS-SHEET 1.

P. GNIFKE.

SELECTOR.

APPLICATION men JULY H.191?- Patented Apr. 18, 1922.

2 SHEETS-SHEET 2.

' Burnett :lo.

erahic by impulses of opposite polarity rfAUL enirxn'. or. MILWAUKEE, WIsooiIsImi-AssIGnoR mo RAILWAY imncrn e MaiivraoTUnmaoQ/ or Application inea'iui is,

T 0 all whom it may concern:

Be it knownthat I, PAUL; GNIFKE, a subject of thenEmperori of Germany, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented: a certain new and useful Improvement in: See lee-tors, ot whiclr the following is a full, clear, concise, and exact description, refer+ ence being had to the-accompanying draw ings, forming a: part of this-specification.

My invention relatesto selectors and more? particularly to the type ot' selectorsknown as astepby step selector, and concerns itself particularly-with the provision of a selector of this naturefor substation work. The selector of my invention is adapted for usein. connectionwitlh a plurality of similar selectors on a signal circuit,'means being: provided'at a central St-atlOIl't O selectively actuate any predetermined one ofthe selectorsassociated with the'line'.

In my co-pendingapplication "Serial No.t 180,707 filed July 16, 1917, onwhich Patent X0; 1,309,569 was issued July 8,1.9l9yi set forth a central station'signal sending device which'is'of use in connection with the selector herein disclosedj V I My invention herein is an improvement] over the selector disclosed; in the patent to 1,110,418, issued September 15,- 1914. I i

My improved modified selector has-provision whereby all'ofthe other stations one. party line may be lockedput so that the party called may use the linewexclusively" telephonic or similar purposes. The selector herein is in general Of the type op which style of operating current is herein referred to alternatingcurrentL v V In order to carry out my'inve'ntion, I ar-f r nge the substation selectors in such a waytn inn current intervenes between each succeed ingstation, Thus if it requires two alter nations or one cycle to call-the station No; 1, then tlie'system' will be so arrangedthat it would require two additional alternations to call'station N0; 2. There is thus an'intermediate "position of the'step by step element, namely that due to the sending'of one additional impulse or alternation which canbe used to'advantage, and this is utilized for sition,

more than one impulseof the alternat-C MILWAu'KEE; scons n? SELECTOR."

Specification of Letters fate'ntli 1:922-

look out- Thus, .i-fi i is desired to call station N 0. 4, for instance, ancllOck out;

all, of" the remaining stat-ions-,' then in accordance with the Valoovegdiscussionl,fourr cycles of altennating: current are transmitted to the line wherebythesignal at station No. 4 is operated: If one a'dd ition'al alternation mitted to the: line, fihlSI'HdCllfiOIlal impulse stat-ion No.- I 51 respond as.- plet-e cycle to bring the" will not he suflicient mime the selectoratf it requires one com-r" selector at the next" following station into operative position, as

before stateclll Thus this; additional impulse.

or alternation sets the seleetoratthecalled V station into-such a condition that'- 1 w v I that particuiar stat-ion has it's telepho-neroi ot her substation equipment connected flto the line, w iereas the intermediate 1 positions 2 occupiedby the: selectors: at the remaining stationsprevent connection 1 of: their substation equip ments tothe line. lff on theg contraryflt is;

- desired] to have all of the substationiequip ments: connected; to the lineglthen theicalling-fli device after having-been operated totrans" mit a call "for a predeterminedstation-is rontinued in: itsoperation'so"that -'the,stepby stepelem'ents at the selectors complete I 1 V to the line, "it being remembered however signaling'device actuated. I

illll' CYClG of move ment'to their-starting p0 1 at'whiclrtime all of thesub'station i u 7 talklng'or similar 'equipments'are connected,

that the predeterminedstation only has its l I 'hat has-been said with regard-"to a1ter-- Y nations in the" above calculation;

In the current to the station succeeding the one which has been called; This one cycle of alternating purposes, as previously explained.

, w V l parag-faph'is equally V true-fit lnsteadofi alternations o'ffcurrent, V cycles ot-current are used as theimits ofparticular form of-{my invention hereinI'have assumedlthat two cycles shall intervene 'hetwe'en' succeedingstations; thus that it requires two cycles alternating 7 send a'call for station No. 1, four vcycl'esfor station i No. 2,,and1so;on I'then' use "for-the locking out'imp'ulses one complete cycle of alternating current,'*w hich un der these circumstances is not s'uilicie'nt to' step up to signaling" positionlthei selector at a I current" can thus be usedflfor the lock out;

T will explain my invention more. in detail by referring to the accompanying drawings, in which Fig. 1 is a front view of a selector constructed in accordance with my invention:

Fig. 2 is a sectional view on line 22. of

Fig. l;

Figs. 3, 5 and 6 are fragmentary views of the control mechanism of the selector;

Figs. '7 8 and9 are fragmentary views of the three different positions occupied by the circuit controlling elements which control the substation circuits;

Fig. 'lOis a diagramatic view illustrating the circuit connectionsinvolved, and

Fig. 11 is a fragmentary top view of a part of the step by step mechanism;

My improved selector is mounted on a base board 10 to which is secured the permanent magnet 11 through the agency of the screws 12; .This permanent magnet through the agency of the screws 13 supports the remaining selector equipment. This selector equipment consists of the two actuating coils let and 15 preferably connected in series which are mounted upon cores l6, 1? respectively, these cores being "secured to the heel piece 18 through the agency of the screws 19,19. The heel piece 18 in turn is held by the screws 13 to the permanent magnet, as already explained.

The pole pieces 20 and 21 project below and are in close proximity to an oscillatingly mounted armature 22 which armature is pivotally supported at 23 and 2%, as clearly apparent. The pole pieces also have inwardly projecting extensions 25 and 26 in co-op 'erative relation with the armature 27. this armature being removably carried.- by the swinging element 28 pivoted at 29. The armature 22 ispolarlzed due to the extension 30 extending forwardly from the permanent magnet i1, but the armatuije 2? isnot polar ized and henceis attracted and swung contracloclrwise from the position it occupies in Fig. 2 whenever current is present in the coils 14, 15. The armature 22 being polarized oscillates back and; forth due to the rhanges of the alternations when alternating current is impressed on the coils let, l5. alternating current when, passing through the coils M, 15 causes the armature 27 to Th e be attracted between the extensions 25 and 32, which bridge structure is secured to the extensions 25 and 26 intermediate of the pole pieces 20 and 21. This bridge structure 32 extends forwardly as more clearly apparent from Fig. '2, and consists of non magnetic material. Besides supporting the armatures 22 and 2'? at the points 23, 2

and 29, respectively, this bridge also carries all of the rest of the equipment, which cooperates with these two armatures. The element 28' is likewise of non-magnetic material, and so is its upper extension 33. A;

shaft 34. mounted between the stander-cs 8i and 35 supports the rotatable step by step apparatus of the selector. It may he stated that the bridge structure 32 consists of two plates held together by the bolts 36, 36. The shaft 84 fixedly carries theescapement wheel 37' which is acted upon by the esrzapement 38 so that this escapemcnt wheel 37 moves one position with each movement of the armature 22. The escapement 38 is pivotally carried by a stud 39 and carries at its lower extremity a pair of fingers 40 which co-operate with a pin ll, this pinbeing carried by an upwardly extending arm 42 rigidly secured to the armature 22. '.his upwardly extending arm terminates in a finger 43. The element 28 likewise has a forwardly projecting finger 4A. The

element 28 also has a forwardly extending toe 45. Upon the same shaft 3a which car,- ries the escapement wheel 3'? there mount ed a disc d6, this disc having a notch 47, which notch has a diiferent angular posi. tion relative to the disc 49 at each one of the selectors. connected to the same line.

This provides a different operative position the engagement between these parts being.

. ictional, new the disc so has once been set for a particular station it remains there unless it is desired to change the combination ornumber of impulses required to actually operate that particular selector. l ixedly secured tothe shaft '34 is the disc 49L This disc has various projecting fingers which accomplish. the same functions as outlined in the patent to Burnett above mentioned. These lingers are respectively the fingers 50,51 and '52. A. flexible conductor 53 extcnds to the element 28. This element 28 carries two contacts respectively the con there pro- I i ion e8 which is used for tact's 54 and 55. These contacts respectively co-operate with fixedly mounted contact springs-56 and 57.

The normal positionof the selector is in-' dicated by the parts'as shown in Fig. 3. If

22, which thereupon operates the escapement 38 to step upg t-he escapement vheel'3f a number of steps equivalent to thenumber of alternations Or impulses received. This movement is clockwise. l/Vhen the armature 27 is attracted the'toe 45. is' out oi the path of any of the parts carried bythe elements :6 or 4:9. The pin 44 however is in the path of the element 50 nndert-his condition of things. Assume now that the escapement wheel 37 has been stepped around very nearly 360 degrees so thatfthe finger 50 comes into contactiwith thepin h-then the arm 51- is in the path of the arm which thereupon prevents movement ofthe" armature 22, thus preventing any further actuation of the escapement wheel- 237. The object of this is that. it is also desired to send a number of impulses greater'than those required to restore all of thefesca'pe' ment wheels'to norrrial so as to pick-t p any that may have lagged in the course of the operation of the system." As soon astheimpulses cease, the armature .27, moves back": into the position" shown in Fi 2;whereupon the 'toe' 45 engages the inclined surface (as shown more clearly in Fig." 11) of" the finger 52 and moves the es'capementf Wheel; together-With the studaiid the parts it carries from the position of Fig. 4' into. the position of Fig. 3. The devicelis then ready'for further impulses.) Assum'efn'ow that it is desired to call a station, then impulses are sent sufiicientto bring the notch 47 of the selector of such station in-toalign. ment With the toe 45. If the impulses" then cease the toe 45 falls into thefnotoh at that particular station; and causes engagement between the contact elements 55 and '57 to ring the substation bell at that particular station. As has already been'explained the next succeeding 'station'would require two complete cycles of alternating current order to bring its notch into'alignmcn't \vith'the toe L5. 4' f Assume however, that after-the station just referred to has been called; that it is desired to lock 'o'ut all of the remaining";

stations,'then a further cycle'of'l eurrent is sent after the elapse of a cer ain timeyin terval and this cycle ofcurrent causesthe re-attraction ofthe armature 27a11d the retation ofthe disc 46 so, that the projection L8 is'now aligned With the .toe 45. Upon cessation of these impulses (whiclnas stated are not'sufiicient to select the succeeding 2T .to bejretra-cted to operate the'local signal.

elements when-"the toe rests ag ainst' station talking set is shown at 62 and. the restation) therestoration of the armature 27 t0 the position shown in Fig. 7 causes the toe 45 to impinge against the projection 48. Under this condition of things no contact is established between the 'elements 54 and- 7 .56. Atfall ofthe'oth'er stations, however,

the toe 45 restsupon the rim of the disc 46 f as shoWn in Fig. 8, and a connection s established between the elements Maud 56;

The establishment of this connection at all 55. l

of -thestations other than the one called 7 short circuits or otherwise renders inopera tive part of the substation equipment so that the similar part of only the substationequip- 'l ment of the station"called-remainsintact for operative purposes. It will be under-- stood, of'course,-that no station has its local signal'operated except that one at which the T toe 45 of the notch47'l I Should it he desired to have'all of the sub-- station equipmentsconnected to the l.ine. then the operations of the substation selectors are continued back to their zero posi-', tion, as shown in Fig. 3. 'atu'hich time the toes 45 of the elements 28 instead ot'resting against theperiphery oi the disc 46 rest against the flat portions59lof the fingers 52 ties are-desired, the required number 0t im- 'p-ulses'are sentto ali n theslotd'? ofithea selected station with the toe 45.1 Whereiuio'n; the impulses, ceas'e permitting the a rmature by connecting the elements. and, Thereupon a surplus of i-nipulses are-transnntted over the line-until ally of the selectors upon the .impulsescease and tl ie restoration oi" the armature 2? causes the selectors to occupy the position ofi Figf 3; All staions are then connect'ed'to' the l i ne,;liiut only; i the selected'station has been ca lled'by h a ing a its signal operated. Thisi-s ofadvantage 11 0 inthatit doesnot' deny the iiseofthe-linei for special or emergency use Without again .Fig. '8 shows the relativepositionoi these periphery'ot the disc 46.-

Fig. 9 shows the'rela-tive position-o-fthese parts when the toe 45 restsagainst the fiat. surface 59-. V 3

The" circuit connectionsv areniore. clearly apparent fromv 10in thatls'how'thesuh station signal 60 co9operatingwith a hat- I tery 61 'a-ndun'der the control. 0 fjtheeleni'ents 55 and" 57, as already explained; 'Afsuh;

sex

element 28- has entered the:

reiv r may of course be of not too high resistance,

its associated induction coil being high wound so that this short circuiting does not seriously intluenre the line conductors. Any other manner oi rendering the substation circuit unfit for use may ot course be utilized, as uill be readily apparent.

From what has been t us described the nature of my invention l clear to those skilled in the 1e angular inoieincnt ot the disc ll; so as to bring the projection 48 into aligiunmit with the toe 4:5 instead the slot 47 requires an impulse or set of impulses not sulhcient to place the next succeeding station into condition For receiving a call.

By the very simple arrangement thus outlined I am enabled to provide a lock out sys tem by virture of which only the called sta-- tion is in condition to fully respond with its substation equipment. Of course, the short circuiting of the receiver 63 would naturally still leave the transmitter 66 in condition to permit the giving of an emergency call should some station. other th an the one using the line he desirous of obtaining the line tor emergency purposes. Whenever the vtoe has dropped into a notch LT,v

then the contact has passed beyond the spring 56 so that at that time no contact is established between'the two, although this oi": course has no special significance.

Having thus described one form which my invention may take, what I claim as new and desire to secure by Letters atent is:

1. The combination of a plurality of step by step signal receiving devices, each comprising a member having a step by step 1 movement, each of said members being adjustable to occupy any one of a plurality of potential sub-station calling positions, the sub-station calling positions of each of said members being difierent from that or all the others, means for moving each of said members to its sub-station calling position, a switching device, signal moans controlled by said switching device, said switching device comprising a movably mounted element engaging said member having the step by step movement to hold said movably mounted element in signal operating position when the member having the step by step movement with which it is associated is in its sub-station calling position, additional substation equlpment comprising a ,I'QCQlVlIlQ, device, means for controlling said additional equipment comprising said member,

means cont-rolled by said member and operatively actuable upon actuation of said member to an mtermediate position other than any of said sub-station calling positions whereb} said sub-station equipment is maintained in operative position after actuation of said signal, and means-whereby said additional sub-station equipment is placed in operative position when said step by step member is in its potential sub-station calling position. 7 I

2. The combination of a plurality of step by step signal receiving devices, each com prising a member having a step by step movement, each of said members being adjustable to occupy any one of a plurality of potential sub-station calling positions, the sub-station calling positions of each of said members being different from that of all the others, means for moving each of said members torits sub-station'calling position, a

switching device, signal means controlled by said switching device, said switching device comprising a movably mounted element engaging said member having the step by step movement to hold said movably mounted element in signal operating position when the member havingthe step by step movement with which it is associated is in its sub-station calling position, additional substation equipment comprising a receiving device, means for controllingsaid additional equipment comprising said -member, means controlled by said member and operatively actuable upon actuation of said member to anintermediate position other than any of said sub-station calling positions, whereby said sub-station equipment is maintained in operative position after. actuation ofsaidl signal, and means whereby said additional sub-station equipment is placed in operative position at all said sub-stations when all said step by step members are in their potential sub-station calling or zero position.

3. A device of the character described comprising a sub-station signal receiving member having a step by step movement, additional substation equipment, the movement of said member being one of step by step rotation from a starting or zero position to a sub-station calling position, aposition for maintaining said additional substation equipment in operative condition and again to said starting or zero position, a tiltable member having means thereon engaging said member having said step by step movement, said tiltable member being provided with means for controlling contacts for throwing said additional equip ment into and out of operation, and means on said member having-said step by step movement engaging said tiltable member to move said last mentioned member into posis tion to maintain said additional sub-station equipment in operative position.

4. A device of the character comprising a sub-station signal receiving member having a step by step movement.

described additional sub-station equipment, the inovement of said member belng one of step by step rotation from a starting or zero POS1- tlon to a sub-station calling pos1t1on, a position for maintaining said additional .sub-

station equipment in operative condition and again to said starting-or zeroposition,

a tiltable member having means thereon en-' gaging said member having-said step by step movement, said tiltabie member being provided with means for controlling contacts for throwing said additional equipment into and out of operation, means on said member having said step by step movement engaging said tiltable member to' move said last mentioned member into position to maintain said additional sub-station equip ment in operative position, andmeans associated With said step by step member engaging said tiitable member to move the same into position to maintain said; additionat' sub-station equipment inoperative position When'saidstepby step member reaches its v i zero position. or 

